61975021 has 8 divisors (see below), whose sum is σ = 62899200. Its totient is φ = 61055232.

The previous prime is 61975009. The next prime is 61975031. The reversal of 61975021 is 12057916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61975021 - 2¹⁵ = 61942253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61975031) 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, 36436 + ... + 38098.

It is an arithmetic number, because the mean of its divisors is an integer number (7862400).

Almost surely, 2^61975021 is an apocalyptic number.

It is an amenable number.

61975021 is a deficient number, since it is larger than the sum of its proper divisors (924179).

61975021 is a wasteful number, since it uses less digits than its factorization.

61975021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 61975021 is about 7872.4215461318. The cubic root of 61975021 is about 395.7360010463.

The spelling of 61975021 in words is "sixty-one million, nine hundred seventy-five thousand, twenty-one".