70420961 has 8 divisors (see below), whose sum is σ = 78453480. Its totient is φ = 62762112.

The previous prime is 70420951. The next prime is 70420969. The reversal of 70420961 is 16902407.

It can be written as a sum of positive squares in 4 ways, for example, as 20647936 + 49773025 = 4544^2 + 7055^2 .

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 70420961 - 2¹⁴ = 70404577 is a prime.

It is a super-2 number, since 2×70420961² = 9918223496327042, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70420969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93020 + ... + 93773.

It is an arithmetic number, because the mean of its divisors is an integer number (9806685).

Almost surely, 2^70420961 is an apocalyptic number.

It is an amenable number.

70420961 is a deficient number, since it is larger than the sum of its proper divisors (8032519).

70420961 is a wasteful number, since it uses less digits than its factorization.

70420961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186835.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 70420961 is about 8391.7197879815. The cubic root of 70420961 is about 412.9530224636.

The spelling of 70420961 in words is "seventy million, four hundred twenty thousand, nine hundred sixty-one".