29142621 has 12 divisors (see below), whose sum is σ = 42218748. Its totient is φ = 19371264.

The previous prime is 29142613. The next prime is 29142661. The reversal of 29142621 is 12624192.

29142621 is a `hidden beast` number, since 29 + 14 + 2 + 621 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4995225 + 24147396 = 2235^2 + 4914^2 .

It is not a de Polignac number, because 29142621 - 2³ = 29142613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29142611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1410 + ... + 7763.

It is an arithmetic number, because the mean of its divisors is an integer number (3518229).

Almost surely, 2^29142621 is an apocalyptic number.

It is an amenable number.

29142621 is a deficient number, since it is larger than the sum of its proper divisors (13076127).

29142621 is a wasteful number, since it uses less digits than its factorization.

29142621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9532 (or 9529 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 29142621 is about 5398.3905935010. The cubic root of 29142621 is about 307.7345107769.

The spelling of 29142621 in words is "twenty-nine million, one hundred forty-two thousand, six hundred twenty-one".