1361531 has 4 divisors (see below), whose sum is σ = 1420752. Its totient is φ = 1302312.

The previous prime is 1361497. The next prime is 1361533. The reversal of 1361531 is 1351631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1361531 - 2¹⁰ = 1360507 is a prime.

It is a super-2 number, since 2×1361531² = 3707533327922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361533) 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, 29576 + ... + 29621.

It is an arithmetic number, because the mean of its divisors is an integer number (355188).

2^1361531 is an apocalyptic number.

1361531 is a deficient number, since it is larger than the sum of its proper divisors (59221).

1361531 is an equidigital number, since it uses as much as digits as its factorization.

1361531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59220.

The product of its digits is 270, while the sum is 20.

The square root of 1361531 is about 1166.8466051714. The cubic root of 1361531 is about 110.8347241363.

The spelling of 1361531 in words is "one million, three hundred sixty-one thousand, five hundred thirty-one".