70542621 has 6 divisors (see below), whose sum is σ = 101894910. Its totient is φ = 47028408.

The previous prime is 70542617. The next prime is 70542631. The reversal of 70542621 is 12624507.

It can be written as a sum of positive squares in only one way, i.e., 60372900 + 10169721 = 7770^2 + 3189^2 .

It is not a de Polignac number, because 70542621 - 2² = 70542617 is a prime.

It is a super-2 number, since 2×70542621² = 9952522755099282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70542631) 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, 3919026 + ... + 3919043.

It is an arithmetic number, because the mean of its divisors is an integer number (16982485).

Almost surely, 2^70542621 is an apocalyptic number.

It is an amenable number.

70542621 is a deficient number, since it is larger than the sum of its proper divisors (31352289).

70542621 is a wasteful number, since it uses less digits than its factorization.

70542621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7838075 (or 7838072 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 70542621 is about 8398.9654720090. The cubic root of 70542621 is about 413.1906929909.

The spelling of 70542621 in words is "seventy million, five hundred forty-two thousand, six hundred twenty-one".