1025152021 has 16 divisors (see below), whose sum is σ = 1079930880. Its totient is φ = 971278000.

The previous prime is 1025152019. The next prime is 1025152039. The reversal of 1025152021 is 1202515201.

It is a cyclic number.

It is not a de Polignac number, because 1025152021 - 2¹ = 1025152019 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 1025152021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025152061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1379376 + ... + 1380118.

It is an arithmetic number, because the mean of its divisors is an integer number (67495680).

Almost surely, 2^1025152021 is an apocalyptic number.

It is an amenable number.

1025152021 is a deficient number, since it is larger than the sum of its proper divisors (54778859).

1025152021 is a wasteful number, since it uses less digits than its factorization.

1025152021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1025152021 is about 32017.9952682862. The cubic root of 1025152021 is about 1008.3146814633.

Adding to 1025152021 its reverse (1202515201), we get a palindrome (2227667222).

The spelling of 1025152021 in words is "one billion, twenty-five million, one hundred fifty-two thousand, twenty-one".