401437561 has 8 divisors (see below), whose sum is σ = 478733184. Its totient is φ = 329128800.

The previous prime is 401437559. The next prime is 401437583. The reversal of 401437561 is 165734104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 401437561 - 2¹ = 401437559 is a prime.

It is a super-2 number, since 2×401437561² = 322304230763257442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401437501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1246540 + ... + 1246861.

It is an arithmetic number, because the mean of its divisors is an integer number (59841648).

Almost surely, 2^401437561 is an apocalyptic number.

It is an amenable number.

401437561 is a deficient number, since it is larger than the sum of its proper divisors (77295623).

401437561 is a wasteful number, since it uses less digits than its factorization.

401437561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493431.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 401437561 is about 20035.9067925562. The cubic root of 401437561 is about 737.6879144252.

It can be divided in two parts, 40 and 1437561, that added together give a square (1437601 = 1199²).

The spelling of 401437561 in words is "four hundred one million, four hundred thirty-seven thousand, five hundred sixty-one".