1234651231 has 8 divisors (see below), whose sum is σ = 1426121424. Its totient is φ = 1056385920.

The previous prime is 1234651199. The next prime is 1234651309. The reversal of 1234651231 is 1321564321.

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

It is a cyclic number.

It is not a de Polignac number, because 1234651231 - 2⁵ = 1234651199 is a prime.

It is a super-2 number, since 2×1234651231² = 3048727324419630722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1234651231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234651531) 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, 3301020 + ... + 3301393.

It is an arithmetic number, because the mean of its divisors is an integer number (178265178).

Almost surely, 2^1234651231 is an apocalyptic number.

1234651231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1234651231 is a deficient number, since it is larger than the sum of its proper divisors (191470193).

1234651231 is a wasteful number, since it uses less digits than its factorization.

1234651231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6602441.

The product of its digits is 4320, while the sum is 28.

The square root of 1234651231 is about 35137.6042296569. The cubic root of 1234651231 is about 1072.7901185533.

The spelling of 1234651231 in words is "one billion, two hundred thirty-four million, six hundred fifty-one thousand, two hundred thirty-one".