1420409381 has 16 divisors (see below), whose sum is σ = 1534982400. Its totient is φ = 1309371648.

The previous prime is 1420409329. The next prime is 1420409387. The reversal of 1420409381 is 1839040241.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1420409381 - 2²² = 1416215077 is a prime.

It is a super-2 number, since 2×1420409381² = 4035125619265606322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420409387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 755000 + ... + 756878.

It is an arithmetic number, because the mean of its divisors is an integer number (95936400).

Almost surely, 2^1420409381 is an apocalyptic number.

It is an amenable number.

1420409381 is a deficient number, since it is larger than the sum of its proper divisors (114573019).

1420409381 is a wasteful number, since it uses less digits than its factorization.

1420409381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1420409381 is about 37688.3188932592. The cubic root of 1420409381 is about 1124.0988684387.

The spelling of 1420409381 in words is "one billion, four hundred twenty million, four hundred nine thousand, three hundred eighty-one".