1401171291 has 48 divisors (see below), whose sum is σ = 2277300480. Its totient is φ = 855787680.

The previous prime is 1401171287. The next prime is 1401171301. The reversal of 1401171291 is 1921711041.

1401171291 is a `hidden beast` number, since 1 + 401 + 171 + 2 + 91 = 666.

It is not a de Polignac number, because 1401171291 - 2² = 1401171287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1401171391) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 437506 + ... + 440696.

It is an arithmetic number, because the mean of its divisors is an integer number (47443760).

Almost surely, 2^1401171291 is an apocalyptic number.

1401171291 is a deficient number, since it is larger than the sum of its proper divisors (876129189).

1401171291 is a wasteful number, since it uses less digits than its factorization.

1401171291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3358 (or 3346 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 1401171291 is about 37432.2226297077. Note that the first 3 decimals coincide. The cubic root of 1401171291 is about 1119.0008337580. Note that the first 3 decimals are identical.

The spelling of 1401171291 in words is "one billion, four hundred one million, one hundred seventy-one thousand, two hundred ninety-one".