70421540 has 48 divisors (see below), whose sum is σ = 169489152. Its totient is φ = 24076416.

The previous prime is 70421537. The next prime is 70421551. The reversal of 70421540 is 4512407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94409 + ... + 95151.

It is an arithmetic number, because the mean of its divisors is an integer number (3531024).

Almost surely, 2^70421540 is an apocalyptic number.

70421540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

70421540 is an abundant number, since it is smaller than the sum of its proper divisors (99067612).

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

70421540 is a wasteful number, since it uses less digits than its factorization.

70421540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436 (or 1434 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 70421540 is about 8391.7542862026. The cubic root of 70421540 is about 412.9541542248.

Adding to 70421540 its reverse (4512407), we get a palindrome (74933947).

The spelling of 70421540 in words is "seventy million, four hundred twenty-one thousand, five hundred forty".