30621045 has 32 divisors (see below), whose sum is σ = 60302592. Its totient is φ = 12920832.

The previous prime is 30621023. The next prime is 30621047. The reversal of 30621045 is 54012603.

It is a happy number.

It is not a de Polignac number, because 30621045 - 2⁸ = 30620789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30621047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9852 + ... + 12581.

It is an arithmetic number, because the mean of its divisors is an integer number (1884456).

Almost surely, 2^30621045 is an apocalyptic number.

30621045 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30621045 is a deficient number, since it is larger than the sum of its proper divisors (29681547).

30621045 is a wasteful number, since it uses less digits than its factorization.

30621045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22461.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 30621045 is about 5533.6285563814. The cubic root of 30621045 is about 312.8527685574.

Adding to 30621045 its reverse (54012603), we get a palindrome (84633648).

The spelling of 30621045 in words is "thirty million, six hundred twenty-one thousand, forty-five".