40495021 has 24 divisors (see below), whose sum is σ = 49641984. Its totient is φ = 32891040.

The previous prime is 40494977. The next prime is 40495043. The reversal of 40495021 is 12059404.

40495021 = 371² + 372² + ... + 556².

It is not a de Polignac number, because 40495021 - 2⁷ = 40494893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40495051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80256 + ... + 80758.

It is an arithmetic number, because the mean of its divisors is an integer number (2068416).

Almost surely, 2^40495021 is an apocalyptic number.

It is an amenable number.

40495021 is a deficient number, since it is larger than the sum of its proper divisors (9146963).

40495021 is a wasteful number, since it uses less digits than its factorization.

40495021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 40495021 is about 6363.5698314704. The cubic root of 40495021 is about 343.4001992702.

The spelling of 40495021 in words is "forty million, four hundred ninety-five thousand, twenty-one".