905142542 has 4 divisors (see below), whose sum is σ = 1357713816. Its totient is φ = 452571270.

The previous prime is 905142521. The next prime is 905142547. The reversal of 905142542 is 245241509.

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

It is a junction number, because it is equal to n+sod(n) for n = 905142499 and 905142508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905142547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 226285634 + ... + 226285637.

It is an arithmetic number, because the mean of its divisors is an integer number (339428454).

Almost surely, 2^905142542 is an apocalyptic number.

905142542 is a deficient number, since it is larger than the sum of its proper divisors (452571274).

905142542 is a wasteful number, since it uses less digits than its factorization.

905142542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452571273.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 905142542 is about 30085.5869479058. The cubic root of 905142542 is about 967.3248079094.

The spelling of 905142542 in words is "nine hundred five million, one hundred forty-two thousand, five hundred forty-two".