401621534 has 4 divisors (see below), whose sum is σ = 602432304. Its totient is φ = 200810766.

The previous prime is 401621497. The next prime is 401621537. The reversal of 401621534 is 435126104.

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

It is a super-2 number, since 2×401621534² = 322599713145026312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401621537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100405382 + ... + 100405385.

It is an arithmetic number, because the mean of its divisors is an integer number (150608076).

Almost surely, 2^401621534 is an apocalyptic number.

401621534 is a deficient number, since it is larger than the sum of its proper divisors (200810770).

401621534 is a wasteful number, since it uses less digits than its factorization.

401621534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200810769.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 401621534 is about 20040.4973491179. The cubic root of 401621534 is about 737.8005877648.

Adding to 401621534 its reverse (435126104), we get a palindrome (836747638).

The spelling of 401621534 in words is "four hundred one million, six hundred twenty-one thousand, five hundred thirty-four".