1240134155 has 32 divisors (see below), whose sum is σ = 1637470464. Its totient is φ = 896075136.

The previous prime is 1240134131. The next prime is 1240134169. The reversal of 1240134155 is 5514310421.

It is a cyclic number.

It is not a de Polignac number, because 1240134155 - 2¹⁰ = 1240133131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 708992 + ... + 710738.

It is an arithmetic number, because the mean of its divisors is an integer number (51170952).

Almost surely, 2^1240134155 is an apocalyptic number.

1240134155 is a deficient number, since it is larger than the sum of its proper divisors (397336309).

1240134155 is a wasteful number, since it uses less digits than its factorization.

1240134155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1240134155 is about 35215.5385447958. The cubic root of 1240134155 is about 1074.3758135944.

Adding to 1240134155 its reverse (5514310421), we get a palindrome (6754444576).

The spelling of 1240134155 in words is "one billion, two hundred forty million, one hundred thirty-four thousand, one hundred fifty-five".