402505145401 has 2 divisors, whose sum is σ = 402505145402. Its totient is φ = 402505145400.

The previous prime is 402505145377. The next prime is 402505145443. The reversal of 402505145401 is 104541505204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 372533226025 + 29971919376 = 610355^2 + 173124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402505145401 is a prime.

It is not a weakly prime, because it can be changed into another prime (402505145461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201252572700 + 201252572701.

It is an arithmetic number, because the mean of its divisors is an integer number (201252572701).

Almost surely, 2^402505145401 is an apocalyptic number.

It is an amenable number.

402505145401 is a deficient number, since it is larger than the sum of its proper divisors (1).

402505145401 is an equidigital number, since it uses as much as digits as its factorization.

402505145401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 402505145401 in words is "four hundred two billion, five hundred five million, one hundred forty-five thousand, four hundred one".