70247421 has 6 divisors (see below), whose sum is σ = 101468510. Its totient is φ = 46831608.

The previous prime is 70247413. The next prime is 70247431. The reversal of 70247421 is 12474207.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 57927321 + 12320100 = 7611^2 + 3510^2 .

It is not a de Polignac number, because 70247421 - 2³ = 70247413 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 (70247431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3902626 + ... + 3902643.

Almost surely, 2^70247421 is an apocalyptic number.

It is an amenable number.

70247421 is a deficient number, since it is larger than the sum of its proper divisors (31221089).

70247421 is a wasteful number, since it uses less digits than its factorization.

70247421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7805275 (or 7805272 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 70247421 is about 8381.3734554666. The cubic root of 70247421 is about 412.6135268794.

The spelling of 70247421 in words is "seventy million, two hundred forty-seven thousand, four hundred twenty-one".