42025731 has 8 divisors (see below), whose sum is σ = 61128384. Its totient is φ = 25470120.

The previous prime is 42025729. The next prime is 42025757. The reversal of 42025731 is 13752024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42025731 - 2¹ = 42025729 is a prime.

It is a super-2 number, since 2×42025731² = 3532324132168722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42025331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636721 + ... + 636786.

It is an arithmetic number, because the mean of its divisors is an integer number (7641048).

Almost surely, 2^42025731 is an apocalyptic number.

42025731 is a deficient number, since it is larger than the sum of its proper divisors (19102653).

42025731 is a wasteful number, since it uses less digits than its factorization.

42025731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273521.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 42025731 is about 6482.7255841968. The cubic root of 42025731 is about 347.6736354272.

Adding to 42025731 its reverse (13752024), we get a palindrome (55777755).

The spelling of 42025731 in words is "forty-two million, twenty-five thousand, seven hundred thirty-one".