1163402251 has 8 divisors (see below), whose sum is σ = 1312930800. Its totient is φ = 1021167840.

The previous prime is 1163402239. The next prime is 1163402257. The reversal of 1163402251 is 1522043611.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1163402251 - 2¹³ = 1163394059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163402257) 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, 1823196 + ... + 1823833.

It is an arithmetic number, because the mean of its divisors is an integer number (164116350).

Almost surely, 2^1163402251 is an apocalyptic number.

1163402251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1163402251 is a deficient number, since it is larger than the sum of its proper divisors (149528549).

1163402251 is a wasteful number, since it uses less digits than its factorization.

1163402251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3647069.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1163402251 is about 34108.6829267857. The cubic root of 1163402251 is about 1051.7438146320.

Adding to 1163402251 its reverse (1522043611), we get a palindrome (2685445862).

The spelling of 1163402251 in words is "one billion, one hundred sixty-three million, four hundred two thousand, two hundred fifty-one".