401324642 has 4 divisors (see below), whose sum is σ = 601986966. Its totient is φ = 200662320.

The previous prime is 401324621. The next prime is 401324659. The reversal of 401324642 is 246423104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 239042521 + 162282121 = 15461^2 + 12739^2 .

It is a super-2 number, since 2×401324642² = 322122936552856328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100331159 + ... + 100331162.

Almost surely, 2^401324642 is an apocalyptic number.

401324642 is a deficient number, since it is larger than the sum of its proper divisors (200662324).

401324642 is a wasteful number, since it uses less digits than its factorization.

401324642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200662323.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 401324642 is about 20033.0886784839. The cubic root of 401324642 is about 737.6187407012.

Adding to 401324642 its reverse (246423104), we get a palindrome (647747746).

The spelling of 401324642 in words is "four hundred one million, three hundred twenty-four thousand, six hundred forty-two".