1040157621 has 12 divisors (see below), whose sum is σ = 1502755072. Its totient is φ = 693297576.

The previous prime is 1040157619. The next prime is 1040157623. The reversal of 1040157621 is 1267510401.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1040157619) and next prime (1040157623).

It is not a de Polignac number, because 1040157621 - 2¹ = 1040157619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040157623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55020 + ... + 71466.

Almost surely, 2^1040157621 is an apocalyptic number.

It is an amenable number.

1040157621 is a deficient number, since it is larger than the sum of its proper divisors (462597451).

1040157621 is a wasteful number, since it uses less digits than its factorization.

1040157621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23480 (or 23477 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 1040157621 is about 32251.4747104687. The cubic root of 1040157621 is about 1013.2105855930.

The spelling of 1040157621 in words is "one billion, forty million, one hundred fifty-seven thousand, six hundred twenty-one".