90151142 has 4 divisors (see below), whose sum is σ = 135226716. Its totient is φ = 45075570.

The previous prime is 90151141. The next prime is 90151147. The reversal of 90151142 is 24115109.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90151141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22537784 + ... + 22537787.

It is an arithmetic number, because the mean of its divisors is an integer number (33806679).

Almost surely, 2^90151142 is an apocalyptic number.

90151142 is a deficient number, since it is larger than the sum of its proper divisors (45075574).

90151142 is a wasteful number, since it uses less digits than its factorization.

90151142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45075573.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 90151142 is about 9494.7955217582. The cubic root of 90151142 is about 448.3911967561.

The spelling of 90151142 in words is "ninety million, one hundred fifty-one thousand, one hundred forty-two".