1240581155 has 16 divisors (see below), whose sum is σ = 1709510400. Its totient is φ = 854753760.

The previous prime is 1240581151. The next prime is 1240581241. The reversal of 1240581155 is 5511850421.

It is not a de Polignac number, because 1240581155 - 2² = 1240581151 is a prime.

It is a super-2 number, since 2×1240581155² = 3078083204282268050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1240581151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 592535 + ... + 594624.

It is an arithmetic number, because the mean of its divisors is an integer number (106844400).

Almost surely, 2^1240581155 is an apocalyptic number.

1240581155 is a deficient number, since it is larger than the sum of its proper divisors (468929245).

1240581155 is a wasteful number, since it uses less digits than its factorization.

1240581155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187194.

The product of its (nonzero) digits is 8000, while the sum is 32.

The square root of 1240581155 is about 35221.8846031839. The cubic root of 1240581155 is about 1074.5048825067.

The spelling of 1240581155 in words is "one billion, two hundred forty million, five hundred eighty-one thousand, one hundred fifty-five".