402102461 has 2 divisors, whose sum is σ = 402102462. Its totient is φ = 402102460.

The previous prime is 402102451. The next prime is 402102473. The reversal of 402102461 is 164201204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331458436 + 70644025 = 18206^2 + 8405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402102461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402102401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201051230 + 201051231.

It is an arithmetic number, because the mean of its divisors is an integer number (201051231).

Almost surely, 2^402102461 is an apocalyptic number.

It is an amenable number.

402102461 is a deficient number, since it is larger than the sum of its proper divisors (1).

402102461 is an equidigital number, since it uses as much as digits as its factorization.

402102461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 402102461 is about 20052.4926380737. The cubic root of 402102461 is about 738.0949666399.

Adding to 402102461 its reverse (164201204), we get a palindrome (566303665).

The spelling of 402102461 in words is "four hundred two million, one hundred two thousand, four hundred sixty-one".