70451520 has 56 divisors (see below), whose sum is σ = 223686624. Its totient is φ = 18786816.

The previous prime is 70451509. The next prime is 70451531. The reversal of 70451520 is 2515407.

It is an interprime number because it is at equal distance from previous prime (70451509) and next prime (70451531).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35734 + ... + 37653.

It is an arithmetic number, because the mean of its divisors is an integer number (3994404).

Almost surely, 2^70451520 is an apocalyptic number.

It is an amenable number.

70451520 is an abundant number, since it is smaller than the sum of its proper divisors (153235104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70451520 is a wasteful number, since it uses less digits than its factorization.

70451520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73407 (or 73397 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 70451520 is about 8393.5403734062. The cubic root of 70451520 is about 413.0127471359.

Adding to 70451520 its reverse (2515407), we get a palindrome (72966927).

The spelling of 70451520 in words is "seventy million, four hundred fifty-one thousand, five hundred twenty".