1259553401 has 4 divisors (see below), whose sum is σ = 1260109812. Its totient is φ = 1258996992.

The previous prime is 1259553397. The next prime is 1259553403. The reversal of 1259553401 is 1043559521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1043559521 = 1579 ⋅660899.

It can be written as a sum of positive squares in 2 ways, for example, as 948948025 + 310605376 = 30805^2 + 17624^2 .

It is a cyclic number.

It is not a de Polignac number, because 1259553401 - 2² = 1259553397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1259553403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274796 + ... + 279341.

It is an arithmetic number, because the mean of its divisors is an integer number (315027453).

Almost surely, 2^1259553401 is an apocalyptic number.

It is an amenable number.

1259553401 is a deficient number, since it is larger than the sum of its proper divisors (556411).

1259553401 is an equidigital number, since it uses as much as digits as its factorization.

1259553401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556410.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 1259553401 is about 35490.1873903196. The cubic root of 1259553401 is about 1079.9546737379.

The spelling of 1259553401 in words is "one billion, two hundred fifty-nine million, five hundred fifty-three thousand, four hundred one".