1240214656 has 16 divisors (see below), whose sum is σ = 2470740390. Its totient is φ = 620107264.

The previous prime is 1240214641. The next prime is 1240214659. The reversal of 1240214656 is 6564120421.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 961992256 + 278222400 = 31016^2 + 16680^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (1240214659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4844461 + ... + 4844716.

Almost surely, 2^1240214656 is an apocalyptic number.

1240214656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1240214656 is a deficient number, since it is larger than the sum of its proper divisors (1230525734).

1240214656 is an frugal number, since it uses more digits than its factorization.

1240214656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9689191 (or 9689179 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1240214656 is about 35216.6815018110. The cubic root of 1240214656 is about 1074.3990601267.

The spelling of 1240214656 in words is "one billion, two hundred forty million, two hundred fourteen thousand, six hundred fifty-six".