42523654 has 4 divisors (see below), whose sum is σ = 63785484. Its totient is φ = 21261826.

The previous prime is 42523643. The next prime is 42523687. The reversal of 42523654 is 45632524.

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

It is a super-2 number, since 2×42523654² = 3616522299023432, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10630912 + ... + 10630915.

It is an arithmetic number, because the mean of its divisors is an integer number (15946371).

Almost surely, 2^42523654 is an apocalyptic number.

42523654 is a deficient number, since it is larger than the sum of its proper divisors (21261830).

42523654 is a wasteful number, since it uses less digits than its factorization.

42523654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21261829.

The product of its digits is 28800, while the sum is 31.

The square root of 42523654 is about 6521.0163318305. The cubic root of 42523654 is about 349.0413330247.

The spelling of 42523654 in words is "forty-two million, five hundred twenty-three thousand, six hundred fifty-four".