400101253 has 4 divisors (see below), whose sum is σ = 400303008. Its totient is φ = 399899500.

The previous prime is 400101223. The next prime is 400101263. The reversal of 400101253 is 352101004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400101253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400101203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97873 + ... + 101878.

It is an arithmetic number, because the mean of its divisors is an integer number (100075752).

Almost surely, 2^400101253 is an apocalyptic number.

It is an amenable number.

400101253 is a deficient number, since it is larger than the sum of its proper divisors (201755).

400101253 is a wasteful number, since it uses less digits than its factorization.

400101253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201754.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 400101253 is about 20002.5311648301. The cubic root of 400101253 is about 736.8684643566.

Adding to 400101253 its reverse (352101004), we get a palindrome (752202257).

The spelling of 400101253 in words is "four hundred million, one hundred one thousand, two hundred fifty-three".