402242645 has 16 divisors (see below), whose sum is σ = 552821760. Its totient is φ = 275236224.

The previous prime is 402242623. The next prime is 402242647. The reversal of 402242645 is 546242204.

It is a cyclic number.

It is not a de Polignac number, because 402242645 - 2¹⁴ = 402226261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402242647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4769 + ... + 28761.

It is an arithmetic number, because the mean of its divisors is an integer number (34551360).

Almost surely, 2^402242645 is an apocalyptic number.

It is an amenable number.

402242645 is a deficient number, since it is larger than the sum of its proper divisors (150579115).

402242645 is a wasteful number, since it uses less digits than its factorization.

402242645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24484.

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 402242645 is about 20055.9877592703. The cubic root of 402242645 is about 738.1807300900.

Adding to 402242645 its reverse (546242204), we get a palindrome (948484849).

The spelling of 402242645 in words is "four hundred two million, two hundred forty-two thousand, six hundred forty-five".