61263021 has 8 divisors (see below), whose sum is σ = 81782560. Its totient is φ = 40792752.

The previous prime is 61263017. The next prime is 61263029. The reversal of 61263021 is 12036216.

It is a happy number.

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

It is not a de Polignac number, because 61263021 - 2² = 61263017 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 (61263029) 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, 9310 + ... + 14463.

It is an arithmetic number, because the mean of its divisors is an integer number (10222820).

Almost surely, 2^61263021 is an apocalyptic number.

It is an amenable number.

61263021 is a deficient number, since it is larger than the sum of its proper divisors (20519539).

61263021 is a wasteful number, since it uses less digits than its factorization.

61263021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24635.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 61263021 is about 7827.0697582173. The cubic root of 61263021 is about 394.2146892688.

Adding to 61263021 its reverse (12036216), we get a palindrome (73299237).

The spelling of 61263021 in words is "sixty-one million, two hundred sixty-three thousand, twenty-one".