61049021 has 12 divisors (see below), whose sum is σ = 67336800. Its totient is φ = 54889560.

The previous prime is 61049017. The next prime is 61049059. The reversal of 61049021 is 12094016.

It is a happy number.

It is not a de Polignac number, because 61049021 - 2² = 61049017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61049081) 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, 306680 + ... + 306878.

It is an arithmetic number, because the mean of its divisors is an integer number (5611400).

Almost surely, 2^61049021 is an apocalyptic number.

It is an amenable number.

61049021 is a deficient number, since it is larger than the sum of its proper divisors (6287779).

61049021 is a wasteful number, since it uses less digits than its factorization.

61049021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 61049021 is about 7813.3872936134. The cubic root of 61049021 is about 393.7551387252.

The spelling of 61049021 in words is "sixty-one million, forty-nine thousand, twenty-one".