85742157 has 4 divisors (see below), whose sum is σ = 114322880. Its totient is φ = 57161436.

The previous prime is 85742143. The next prime is 85742159. The reversal of 85742157 is 75124758.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 85742157 - 2⁴ = 85742141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85742159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14290357 + ... + 14290362.

It is an arithmetic number, because the mean of its divisors is an integer number (28580720).

Almost surely, 2^85742157 is an apocalyptic number.

It is an amenable number.

85742157 is a deficient number, since it is larger than the sum of its proper divisors (28580723).

85742157 is a wasteful number, since it uses less digits than its factorization.

85742157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28580722.

The product of its digits is 78400, while the sum is 39.

The square root of 85742157 is about 9259.7060968478. The cubic root of 85742157 is about 440.9589227529.

It can be divided in two parts, 8574 and 2157, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 85742157 in words is "eighty-five million, seven hundred forty-two thousand, one hundred fifty-seven".