40987451 has 4 divisors (see below), whose sum is σ = 41599272. Its totient is φ = 40375632.

The previous prime is 40987439. The next prime is 40987481. The reversal of 40987451 is 15478904.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40987451 is a prime.

It is a super-2 number, since 2×40987451² = 3359942278954802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40987421) 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, 305810 + ... + 305943.

It is an arithmetic number, because the mean of its divisors is an integer number (10399818).

Almost surely, 2^40987451 is an apocalyptic number.

40987451 is a deficient number, since it is larger than the sum of its proper divisors (611821).

40987451 is an equidigital number, since it uses as much as digits as its factorization.

40987451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611820.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 40987451 is about 6402.1442501712. The cubic root of 40987451 is about 344.7865402223.

The spelling of 40987451 in words is "forty million, nine hundred eighty-seven thousand, four hundred fifty-one".