1351256401 has 8 divisors (see below), whose sum is σ = 1474641504. Its totient is φ = 1227961920.

The previous prime is 1351256377. The next prime is 1351256443. The reversal of 1351256401 is 1046521531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1351256401 - 2¹⁹ = 1350732113 is a prime.

It is a super-2 number, since 2×1351256401² = 3651787722486945602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1351256401.

It is not an unprimeable number, because it can be changed into a prime (1351256461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10666 + ... + 53068.

It is an arithmetic number, because the mean of its divisors is an integer number (184330188).

Almost surely, 2^1351256401 is an apocalyptic number.

1351256401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1351256401 is a deficient number, since it is larger than the sum of its proper divisors (123385103).

1351256401 is a wasteful number, since it uses less digits than its factorization.

1351256401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45311.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1351256401 is about 36759.4396176003. The cubic root of 1351256401 is about 1105.5522040883.

Adding to 1351256401 its reverse (1046521531), we get a palindrome (2397777932).

It can be divided in two parts, 1351 and 256401, that added together give a palindrome (257752).

The spelling of 1351256401 in words is "one billion, three hundred fifty-one million, two hundred fifty-six thousand, four hundred one".