1025121634 has 16 divisors (see below), whose sum is σ = 1580527872. Its totient is φ = 498386448.

The previous prime is 1025121599. The next prime is 1025121679. The reversal of 1025121634 is 4361215201.

It is a happy number.

1025121634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1025121599 and 1025121608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7549 + ... + 45904.

It is an arithmetic number, because the mean of its divisors is an integer number (98782992).

Almost surely, 2^1025121634 is an apocalyptic number.

1025121634 is a deficient number, since it is larger than the sum of its proper divisors (555406238).

1025121634 is a wasteful number, since it uses less digits than its factorization.

1025121634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53721.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1025121634 is about 32017.5207347477. The cubic root of 1025121634 is about 1008.3047187260.

Adding to 1025121634 its reverse (4361215201), we get a palindrome (5386336835).

The spelling of 1025121634 in words is "one billion, twenty-five million, one hundred twenty-one thousand, six hundred thirty-four".