401266247 has 2 divisors, whose sum is σ = 401266248. Its totient is φ = 401266246.

The previous prime is 401266241. The next prime is 401266319. The reversal of 401266247 is 742662104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401266247 - 2²⁴ = 384489031 is a prime.

It is a super-2 number, since 2×401266247² = 322029201962930018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401266241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200633123 + 200633124.

It is an arithmetic number, because the mean of its divisors is an integer number (200633124).

Almost surely, 2^401266247 is an apocalyptic number.

401266247 is a deficient number, since it is larger than the sum of its proper divisors (1).

401266247 is an equidigital number, since it uses as much as digits as its factorization.

401266247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 401266247 is about 20031.6311617402. The cubic root of 401266247 is about 737.5829630695.

The spelling of 401266247 in words is "four hundred one million, two hundred sixty-six thousand, two hundred forty-seven".