1440731 has 2 divisors, whose sum is σ = 1440732. Its totient is φ = 1440730.

The previous prime is 1440727. The next prime is 1440737. The reversal of 1440731 is 1370441.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1440731 - 2² = 1440727 is a prime.

It is a super-2 number, since 2×1440731² = 4151411628722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1440737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720365 + 720366.

It is an arithmetic number, because the mean of its divisors is an integer number (720366).

2^1440731 is an apocalyptic number.

1440731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440731 is an equidigital number, since it uses as much as digits as its factorization.

1440731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 1440731 is about 1200.3045446886. The cubic root of 1440731 is about 112.9434284926.

The spelling of 1440731 in words is "one million, four hundred forty thousand, seven hundred thirty-one".