1301531 has 8 divisors (see below), whose sum is σ = 1622784. Its totient is φ = 1014120.

The previous prime is 1301527. The next prime is 1301533. The reversal of 1301531 is 1351031.

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 1301531 - 2² = 1301527 is a prime.

It is a super-2 number, since 2×1301531² = 3387965887922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1301533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8375 + ... + 8528.

It is an arithmetic number, because the mean of its divisors is an integer number (202848).

2^1301531 is an apocalyptic number.

1301531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1301531 is a deficient number, since it is larger than the sum of its proper divisors (321253).

1301531 is a wasteful number, since it uses less digits than its factorization.

1301531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16921.

The product of its (nonzero) digits is 45, while the sum is 14.

The square root of 1301531 is about 1140.8466154571. The cubic root of 1301531 is about 109.1821156648.

Adding to 1301531 its reverse (1351031), we get a palindrome (2652562).

It can be divided in two parts, 130 and 1531, that added together give a palindrome (1661).

The spelling of 1301531 in words is "one million, three hundred one thousand, five hundred thirty-one".