401947271 has 32 divisors (see below), whose sum is σ = 467613696. Its totient is φ = 342144000.

The previous prime is 401947267. The next prime is 401947277. The reversal of 401947271 is 172749104.

It is a Cunningham number, because it is equal to 738³-1.

It is not a de Polignac number, because 401947271 - 2² = 401947267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401947277) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1667711 + ... + 1667951.

It is an arithmetic number, because the mean of its divisors is an integer number (14612928).

Almost surely, 2^401947271 is an apocalyptic number.

401947271 is a deficient number, since it is larger than the sum of its proper divisors (65666425).

401947271 is a wasteful number, since it uses less digits than its factorization.

401947271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 401947271 is about 20048.6226708969. The cubic root of 401947271 is about 737.9999993880. Note that the first 6 decimals are identical.

The spelling of 401947271 in words is "four hundred one million, nine hundred forty-seven thousand, two hundred seventy-one".