1361731 has 8 divisors (see below), whose sum is σ = 1589760. Its totient is φ = 1142088.

The previous prime is 1361713. The next prime is 1361741. The reversal of 1361731 is 1371631.

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 1361731 - 2⁵ = 1361699 is a prime.

It is a super-2 number, since 2×1361731² = 3708622632722, which contains 22 as substring.

It is a Duffinian number.

1361731 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1361741) 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, 1741 + ... + 2398.

It is an arithmetic number, because the mean of its divisors is an integer number (198720).

2^1361731 is an apocalyptic number.

1361731 is a deficient number, since it is larger than the sum of its proper divisors (228029).

1361731 is an equidigital number, since it uses as much as digits as its factorization.

1361731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4193.

The product of its digits is 378, while the sum is 22.

The square root of 1361731 is about 1166.9323030922. The cubic root of 1361731 is about 110.8401508360.

The spelling of 1361731 in words is "one million, three hundred sixty-one thousand, seven hundred thirty-one".