742072155 has 32 divisors (see below), whose sum is σ = 1339925760. Its totient is φ = 347383680.

The previous prime is 742072139. The next prime is 742072157. The reversal of 742072155 is 551270247.

It is not a de Polignac number, because 742072155 - 2⁴ = 742072139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (742072157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72757 + ... + 82326.

It is an arithmetic number, because the mean of its divisors is an integer number (41872680).

Almost surely, 2^742072155 is an apocalyptic number.

742072155 is a deficient number, since it is larger than the sum of its proper divisors (597853605).

742072155 is a wasteful number, since it uses less digits than its factorization.

742072155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155131.

The product of its (nonzero) digits is 19600, while the sum is 33.

The square root of 742072155 is about 27241.0013582467. The cubic root of 742072155 is about 905.3476498771.

The spelling of 742072155 in words is "seven hundred forty-two million, seventy-two thousand, one hundred fifty-five".