1025699961 has 16 divisors (see below), whose sum is σ = 1606691520. Its totient is φ = 573817920.

The previous prime is 1025699953. The next prime is 1025699963. The reversal of 1025699961 is 1699965201.

It is not a de Polignac number, because 1025699961 - 2³ = 1025699953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1025699961.

It is not an unprimeable number, because it can be changed into a prime (1025699963) 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, 1195026 + ... + 1195883.

It is an arithmetic number, because the mean of its divisors is an integer number (100418220).

Almost surely, 2^1025699961 is an apocalyptic number.

1025699961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1025699961 is a deficient number, since it is larger than the sum of its proper divisors (580991559).

1025699961 is a wasteful number, since it uses less digits than its factorization.

1025699961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390936.

The product of its (nonzero) digits is 262440, while the sum is 48.

The square root of 1025699961 is about 32026.5508757968. The cubic root of 1025699961 is about 1008.4942963005.

The spelling of 1025699961 in words is "one billion, twenty-five million, six hundred ninety-nine thousand, nine hundred sixty-one".