91142242 has 4 divisors (see below), whose sum is σ = 136713366. Its totient is φ = 45571120.

The previous prime is 91142239. The next prime is 91142269. The reversal of 91142242 is 24224119.

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

It can be written as a sum of positive squares in only one way, i.e., 89699841 + 1442401 = 9471^2 + 1201^2 .

It is a super-3 number, since 3×91142242³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22785559 + ... + 22785562.

Almost surely, 2^91142242 is an apocalyptic number.

91142242 is a deficient number, since it is larger than the sum of its proper divisors (45571124).

91142242 is a wasteful number, since it uses less digits than its factorization.

91142242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45571123.

The product of its digits is 1152, while the sum is 25.

The square root of 91142242 is about 9546.8446096079. The cubic root of 91142242 is about 450.0283801031.

The spelling of 91142242 in words is "ninety-one million, one hundred forty-two thousand, two hundred forty-two".