61457021 has 8 divisors (see below), whose sum is σ = 62522304. Its totient is φ = 60397920.

The previous prime is 61457017. The next prime is 61457027. The reversal of 61457021 is 12075416.

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 61457021 - 2² = 61457017 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 (61457027) 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, 21350 + ... + 24056.

It is an arithmetic number, because the mean of its divisors is an integer number (7815288).

Almost surely, 2^61457021 is an apocalyptic number.

It is an amenable number.

61457021 is a deficient number, since it is larger than the sum of its proper divisors (1065283).

61457021 is a wasteful number, since it uses less digits than its factorization.

61457021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3091.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 61457021 is about 7839.4528508053. The cubic root of 61457021 is about 394.6303672400.

The spelling of 61457021 in words is "sixty-one million, four hundred fifty-seven thousand, twenty-one".