1240653155 has 8 divisors (see below), whose sum is σ = 1701467232. Its totient is φ = 850733568.

The previous prime is 1240653133. The next prime is 1240653181. The reversal of 1240653155 is 5513560421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240653155 is a prime.

It is a super-2 number, since 2×1240653155² = 3078440502022908050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17723582 + ... + 17723651.

It is an arithmetic number, because the mean of its divisors is an integer number (212683404).

Almost surely, 2^1240653155 is an apocalyptic number.

1240653155 is a deficient number, since it is larger than the sum of its proper divisors (460814077).

1240653155 is an equidigital number, since it uses as much as digits as its factorization.

1240653155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35447245.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 1240653155 is about 35222.9066801705. The cubic root of 1240653155 is about 1074.5256692309.

The spelling of 1240653155 in words is "one billion, two hundred forty million, six hundred fifty-three thousand, one hundred fifty-five".