401654501 has 2 divisors, whose sum is σ = 401654502. Its totient is φ = 401654500.

The previous prime is 401654489. The next prime is 401654521. The reversal of 401654501 is 105456104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205234276 + 196420225 = 14326^2 + 14015^2 .

It is a cyclic number.

It is not a de Polignac number, because 401654501 - 2¹⁰ = 401653477 is a prime.

It is a super-2 number, since 2×401654501² = 322652676347118002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401654521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200827250 + 200827251.

It is an arithmetic number, because the mean of its divisors is an integer number (200827251).

Almost surely, 2^401654501 is an apocalyptic number.

It is an amenable number.

401654501 is a deficient number, since it is larger than the sum of its proper divisors (1).

401654501 is an equidigital number, since it uses as much as digits as its factorization.

401654501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 401654501 is about 20041.3198417669. The cubic root of 401654501 is about 737.8207746027.

The spelling of 401654501 in words is "four hundred one million, six hundred fifty-four thousand, five hundred one".