27492021 has 8 divisors (see below), whose sum is σ = 40728960. Its totient is φ = 18327996.

The previous prime is 27492013. The next prime is 27492037. The reversal of 27492021 is 12029472.

It is not a de Polignac number, because 27492021 - 2³ = 27492013 is a prime.

It is a super-3 number, since 3×27492021³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1018223 = 27492021 / (2 + 7 + 4 + 9 + 2 + 0 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27492121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509085 + ... + 509138.

It is an arithmetic number, because the mean of its divisors is an integer number (5091120).

Almost surely, 2^27492021 is an apocalyptic number.

It is an amenable number.

27492021 is a deficient number, since it is larger than the sum of its proper divisors (13236939).

27492021 is a wasteful number, since it uses less digits than its factorization.

27492021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018232 (or 1018226 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 27492021 is about 5243.2834178595. The cubic root of 27492021 is about 301.8113414628.

The spelling of 27492021 in words is "twenty-seven million, four hundred ninety-two thousand, twenty-one".