401872249 has 4 divisors (see below), whose sum is σ = 423023440. Its totient is φ = 380721060.

The previous prime is 401872243. The next prime is 401872277. The reversal of 401872249 is 942278104.

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 not a de Polignac number, because 401872249 - 2⁹ = 401871737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401872243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10575567 + ... + 10575604.

It is an arithmetic number, because the mean of its divisors is an integer number (105755860).

Almost surely, 2^401872249 is an apocalyptic number.

It is an amenable number.

401872249 is a deficient number, since it is larger than the sum of its proper divisors (21151191).

401872249 is a wasteful number, since it uses less digits than its factorization.

401872249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21151190.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 401872249 is about 20046.7515822390. The cubic root of 401872249 is about 737.9540815235.

It can be divided in two parts, 40187 and 2249, that added together give a square (42436 = 206²).

The spelling of 401872249 in words is "four hundred one million, eight hundred seventy-two thousand, two hundred forty-nine".