1490078421 has 12 divisors (see below), whose sum is σ = 2317899948. Its totient is φ = 916971264.

The previous prime is 1490078383. The next prime is 1490078431. The reversal of 1490078421 is 1248700941.

It can be written as a sum of positive squares in 2 ways, for example, as 191268900 + 1298809521 = 13830^2 + 36039^2 .

It is not a de Polignac number, because 1490078421 - 2¹⁰ = 1490077397 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1490078431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6367740 + ... + 6367973.

It is an arithmetic number, because the mean of its divisors is an integer number (193158329).

Almost surely, 2^1490078421 is an apocalyptic number.

It is an amenable number.

1490078421 is a deficient number, since it is larger than the sum of its proper divisors (827821527).

1490078421 is a wasteful number, since it uses less digits than its factorization.

1490078421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12735732 (or 12735729 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1490078421 is about 38601.5339202991. The cubic root of 1490078421 is about 1142.1847967986.

The spelling of 1490078421 in words is "one billion, four hundred ninety million, seventy-eight thousand, four hundred twenty-one".