31421042 has 8 divisors (see below), whose sum is σ = 48652032. Its totient is φ = 15203700.

The previous prime is 31421009. The next prime is 31421053. The reversal of 31421042 is 24012413.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31421042.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253334 + ... + 253457.

It is an arithmetic number, because the mean of its divisors is an integer number (6081504).

Almost surely, 2^31421042 is an apocalyptic number.

31421042 is a deficient number, since it is larger than the sum of its proper divisors (17230990).

31421042 is a wasteful number, since it uses less digits than its factorization.

31421042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506824.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31421042 is about 5605.4475289668. The cubic root of 31421042 is about 315.5538823135.

Adding to 31421042 its reverse (24012413), we get a palindrome (55433455).

The spelling of 31421042 in words is "thirty-one million, four hundred twenty-one thousand, forty-two".