1025235421 has 16 divisors (see below), whose sum is σ = 1237622400. Its totient is φ = 829649088.

The previous prime is 1025235401. The next prime is 1025235427. The reversal of 1025235421 is 1245325201.

It is a cyclic number.

It is not a de Polignac number, because 1025235421 - 2⁷ = 1025235293 is a prime.

It is a super-2 number, since 2×1025235421² = 2102215336946094482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025235427) 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, 25815 + ... + 52123.

It is an arithmetic number, because the mean of its divisors is an integer number (77351400).

Almost surely, 2^1025235421 is an apocalyptic number.

It is an amenable number.

1025235421 is a deficient number, since it is larger than the sum of its proper divisors (212386979).

1025235421 is a wasteful number, since it uses less digits than its factorization.

1025235421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26628.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1025235421 is about 32019.2976343954. The cubic root of 1025235421 is about 1008.3420241281.

The spelling of 1025235421 in words is "one billion, twenty-five million, two hundred thirty-five thousand, four hundred twenty-one".