261915452 has 24 divisors (see below), whose sum is σ = 473603424. Its totient is φ = 126643392.

The previous prime is 261915439. The next prime is 261915461. The reversal of 261915452 is 254519162.

It is a happy number.

It is a congruent number.

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, 19418 + ... + 30014.

It is an arithmetic number, because the mean of its divisors is an integer number (19733476).

Almost surely, 2^261915452 is an apocalyptic number.

It is an amenable number.

261915452 is a deficient number, since it is larger than the sum of its proper divisors (211687972).

261915452 is a wasteful number, since it uses less digits than its factorization.

261915452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10805 (or 10803 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The square root of 261915452 is about 16183.8021490625. The cubic root of 261915452 is about 639.8139530832.

The spelling of 261915452 in words is "two hundred sixty-one million, nine hundred fifteen thousand, four hundred fifty-two".