31242001 has 4 divisors (see below), whose sum is σ = 35705152. Its totient is φ = 26778852.

The previous prime is 31241993. The next prime is 31242007. The reversal of 31242001 is 10024213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10024213 = 41 ⋅244493.

It is a cyclic number.

It is not a de Polignac number, because 31242001 - 2³ = 31241993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31242007) 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, 2231565 + ... + 2231578.

It is an arithmetic number, because the mean of its divisors is an integer number (8926288).

Almost surely, 2^31242001 is an apocalyptic number.

It is an amenable number.

31242001 is a deficient number, since it is larger than the sum of its proper divisors (4463151).

31242001 is an equidigital number, since it uses as much as digits as its factorization.

31242001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4463150.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 31242001 is about 5589.4544456503. The cubic root of 31242001 is about 314.9533852244.

Adding to 31242001 its reverse (10024213), we get a palindrome (41266214).

The spelling of 31242001 in words is "thirty-one million, two hundred forty-two thousand, one".