40149421 has 16 divisors (see below), whose sum is σ = 46093824. Its totient is φ = 34683264.

The previous prime is 40149409. The next prime is 40149437. The reversal of 40149421 is 12494104.

It is not a de Polignac number, because 40149421 - 2⁹ = 40148909 is a prime.

It is a super-2 number, since 2×40149421² = 3223952013270482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40149481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12625 + ... + 15481.

It is an arithmetic number, because the mean of its divisors is an integer number (2880864).

Almost surely, 2^40149421 is an apocalyptic number.

It is an amenable number.

40149421 is a deficient number, since it is larger than the sum of its proper divisors (5944403).

40149421 is a wasteful number, since it uses less digits than its factorization.

40149421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 40149421 is about 6336.3570764281. The cubic root of 40149421 is about 342.4205040428.

The spelling of 40149421 in words is "forty million, one hundred forty-nine thousand, four hundred twenty-one".