261457274 has 16 divisors (see below), whose sum is σ = 424364640. Its totient is φ = 120098160.

The previous prime is 261457241. The next prime is 261457279. The reversal of 261457274 is 472754162.

It is a super-2 number, since 2×261457274² = 136719812255022152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261457279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18344 + ... + 29315.

It is an arithmetic number, because the mean of its divisors is an integer number (26522790).

Almost surely, 2^261457274 is an apocalyptic number.

261457274 is a deficient number, since it is larger than the sum of its proper divisors (162907366).

261457274 is a wasteful number, since it uses less digits than its factorization.

261457274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47885.

The product of its digits is 94080, while the sum is 38.

The square root of 261457274 is about 16169.6405031157. The cubic root of 261457274 is about 639.4406522337.

The spelling of 261457274 in words is "two hundred sixty-one million, four hundred fifty-seven thousand, two hundred seventy-four".