61070421 has 4 divisors (see below), whose sum is σ = 81427232. Its totient is φ = 40713612.

The previous prime is 61070417. The next prime is 61070431. The reversal of 61070421 is 12407016.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61070421 - 2² = 61070417 is a prime.

It is a super-2 number, since 2×61070421² = 7459192642234482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61070431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10178401 + ... + 10178406.

It is an arithmetic number, because the mean of its divisors is an integer number (20356808).

Almost surely, 2^61070421 is an apocalyptic number.

It is an amenable number.

61070421 is a deficient number, since it is larger than the sum of its proper divisors (20356811).

61070421 is a wasteful number, since it uses less digits than its factorization.

61070421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20356810.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 61070421 is about 7814.7566180912. The cubic root of 61070421 is about 393.8011420596.

Adding to 61070421 its reverse (12407016), we get a palindrome (73477437).

The spelling of 61070421 in words is "sixty-one million, seventy thousand, four hundred twenty-one".