402012541 has 4 divisors (see below), whose sum is σ = 459442912. Its totient is φ = 344582172.

The previous prime is 402012539. The next prime is 402012563. The reversal of 402012541 is 145210204.

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.

It is a cyclic number.

It is not a de Polignac number, because 402012541 - 2¹ = 402012539 is a prime.

It is a super-2 number, since 2×402012541² = 323228166242553362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402012521) 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, 28715175 + ... + 28715188.

It is an arithmetic number, because the mean of its divisors is an integer number (114860728).

Almost surely, 2^402012541 is an apocalyptic number.

It is an amenable number.

402012541 is a deficient number, since it is larger than the sum of its proper divisors (57430371).

402012541 is an equidigital number, since it uses as much as digits as its factorization.

402012541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57430370.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 402012541 is about 20050.2503974389. The cubic root of 402012541 is about 738.0399438088.

Adding to 402012541 its reverse (145210204), we get a palindrome (547222745).

It can be divided in two parts, 4020 and 12541, that added together give a palindrome (16561).

The spelling of 402012541 in words is "four hundred two million, twelve thousand, five hundred forty-one".