401266251 has 8 divisors (see below), whose sum is σ = 594468560. Its totient is φ = 267510816.

The previous prime is 401266247. The next prime is 401266319. The reversal of 401266251 is 152662104.

401266251 is a `hidden beast` number, since 401 + 2 + 6 + 6 + 251 = 666.

It is not a de Polignac number, because 401266251 - 2² = 401266247 is a prime.

It is a super-2 number, since 2×401266251² = 322029208383190002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 14861713 = 401266251 / (4 + 0 + 1 + 2 + 6 + 6 + 2 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401266241) 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, 7430830 + ... + 7430883.

It is an arithmetic number, because the mean of its divisors is an integer number (74308570).

Almost surely, 2^401266251 is an apocalyptic number.

401266251 is a deficient number, since it is larger than the sum of its proper divisors (193202309).

401266251 is a wasteful number, since it uses less digits than its factorization.

401266251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14861722 (or 14861716 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 401266251 is about 20031.6312615823. The cubic root of 401266251 is about 737.5829655204.

The spelling of 401266251 in words is "four hundred one million, two hundred sixty-six thousand, two hundred fifty-one".