752421490 has 8 divisors (see below), whose sum is σ = 1354358700. Its totient is φ = 300968592.

The previous prime is 752421487. The next prime is 752421493. The reversal of 752421490 is 94124257.

It is an interprime number because it is at equal distance from previous prime (752421487) and next prime (752421493).

It can be written as a sum of positive squares in 2 ways, for example, as 736525321 + 15896169 = 27139^2 + 3987^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×752421490² = 1132276197227640200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (752421493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37621065 + ... + 37621084.

Almost surely, 2^752421490 is an apocalyptic number.

752421490 is a deficient number, since it is larger than the sum of its proper divisors (601937210).

752421490 is a wasteful number, since it uses less digits than its factorization.

752421490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75242156.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 752421490 is about 27430.3024044577. The cubic root of 752421490 is about 909.5370547076.

The spelling of 752421490 in words is "seven hundred fifty-two million, four hundred twenty-one thousand, four hundred ninety".