1149271631 has 16 divisors (see below), whose sum is σ = 1182382656. Its totient is φ = 1116758016.

The previous prime is 1149271603. The next prime is 1149271667. The reversal of 1149271631 is 1361729411.

It is a cyclic number.

It is not a de Polignac number, because 1149271631 - 2¹⁸ = 1149009487 is a prime.

It is a super-2 number, since 2×1149271631² = 2641650563642800322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1149271591 and 1149271600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149271691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2653991 + ... + 2654423.

It is an arithmetic number, because the mean of its divisors is an integer number (73898916).

Almost surely, 2^1149271631 is an apocalyptic number.

1149271631 is a deficient number, since it is larger than the sum of its proper divisors (33111025).

1149271631 is a wasteful number, since it uses less digits than its factorization.

1149271631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962.

The product of its digits is 9072, while the sum is 35.

The square root of 1149271631 is about 33900.9089996124. The cubic root of 1149271631 is about 1047.4683167205.

The spelling of 1149271631 in words is "one billion, one hundred forty-nine million, two hundred seventy-one thousand, six hundred thirty-one".