261125654 has 4 divisors (see below), whose sum is σ = 391688484. Its totient is φ = 130562826.

The previous prime is 261125633. The next prime is 261125789. The reversal of 261125654 is 456521162.

261125654 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 261125654.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65281412 + ... + 65281415.

It is an arithmetic number, because the mean of its divisors is an integer number (97922121).

Almost surely, 2^261125654 is an apocalyptic number.

261125654 is a deficient number, since it is larger than the sum of its proper divisors (130562830).

261125654 is a wasteful number, since it uses less digits than its factorization.

261125654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130562829.

The product of its digits is 14400, while the sum is 32.

The square root of 261125654 is about 16159.3828471263. The cubic root of 261125654 is about 639.1701924615.

The spelling of 261125654 in words is "two hundred sixty-one million, one hundred twenty-five thousand, six hundred fifty-four".