1231653457 has 8 divisors (see below), whose sum is σ = 1246553000. Its totient is φ = 1216819584.

The previous prime is 1231653431. The next prime is 1231653487. The reversal of 1231653457 is 7543561321.

It can be written as a sum of positive squares in 4 ways, for example, as 501356881 + 730296576 = 22391^2 + 27024^2 .

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 1231653457 - 2¹¹ = 1231651409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231653487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21853 + ... + 54229.

It is an arithmetic number, because the mean of its divisors is an integer number (155819125).

Almost surely, 2^1231653457 is an apocalyptic number.

It is an amenable number.

1231653457 is a deficient number, since it is larger than the sum of its proper divisors (14899543).

1231653457 is a wasteful number, since it uses less digits than its factorization.

1231653457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32835.

The product of its digits is 75600, while the sum is 37.

The square root of 1231653457 is about 35094.9206723708. The cubic root of 1231653457 is about 1071.9211582624.

The spelling of 1231653457 in words is "one billion, two hundred thirty-one million, six hundred fifty-three thousand, four hundred fifty-seven".