1030507921 has 32 divisors (see below), whose sum is σ = 1198955520. Its totient is φ = 879206400.

The previous prime is 1030507913. The next prime is 1030507937. The reversal of 1030507921 is 1297050301.

It is a cyclic number.

It is not a de Polignac number, because 1030507921 - 2³ = 1030507913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1030507921.

It is not an unprimeable number, because it can be changed into a prime (1030507321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 970731 + ... + 971791.

It is an arithmetic number, because the mean of its divisors is an integer number (37467360).

Almost surely, 2^1030507921 is an apocalyptic number.

It is an amenable number.

1030507921 is a deficient number, since it is larger than the sum of its proper divisors (168447599).

1030507921 is a wasteful number, since it uses less digits than its factorization.

1030507921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 1030507921 is about 32101.5252129864. The cubic root of 1030507921 is about 1010.0676100870.

The spelling of 1030507921 in words is "one billion, thirty million, five hundred seven thousand, nine hundred twenty-one".