40097251 has 4 divisors (see below), whose sum is σ = 40950432. Its totient is φ = 39244072.

The previous prime is 40097249. The next prime is 40097263. The reversal of 40097251 is 15279004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40097251 - 2¹ = 40097249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40097231) 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, 426520 + ... + 426613.

It is an arithmetic number, because the mean of its divisors is an integer number (10237608).

Almost surely, 2^40097251 is an apocalyptic number.

40097251 is a deficient number, since it is larger than the sum of its proper divisors (853181).

40097251 is an equidigital number, since it uses as much as digits as its factorization.

40097251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853180.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 40097251 is about 6332.2390194938. The cubic root of 40097251 is about 342.2721264710.

The spelling of 40097251 in words is "forty million, ninety-seven thousand, two hundred fifty-one".