261457046 has 4 divisors (see below), whose sum is σ = 392185572. Its totient is φ = 130728522.

The previous prime is 261457033. The next prime is 261457051. The reversal of 261457046 is 640754162.

261457046 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, and also an emirpimes, since its reverse is a distinct semiprime: 640754162 = 2 ⋅320377081.

It is a super-2 number, since 2×261457046² = 136719573806092232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261456997 and 261457015.

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, 65364260 + ... + 65364263.

It is an arithmetic number, because the mean of its divisors is an integer number (98046393).

Almost surely, 2^261457046 is an apocalyptic number.

261457046 is a deficient number, since it is larger than the sum of its proper divisors (130728526).

261457046 is a wasteful number, since it uses less digits than its factorization.

261457046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130728525.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 261457046 is about 16169.6334528647. The cubic root of 261457046 is about 639.4404663620.

The spelling of 261457046 in words is "two hundred sixty-one million, four hundred fifty-seven thousand, forty-six".