1292401380 has 24 divisors (see below), whose sum is σ = 3618724032. Its totient is φ = 344640352.

The previous prime is 1292401373. The next prime is 1292401381. The reversal of 1292401380 is 831042921.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1292401381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10769952 + ... + 10770071.

It is an arithmetic number, because the mean of its divisors is an integer number (150780168).

Almost surely, 2^1292401380 is an apocalyptic number.

1292401380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1292401380 is an abundant number, since it is smaller than the sum of its proper divisors (2326322652).

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

1292401380 is a wasteful number, since it uses less digits than its factorization.

1292401380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21540035 (or 21540033 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1292401380 is about 35949.9844228061. The cubic root of 1292401380 is about 1089.2622957784.

The spelling of 1292401380 in words is "one billion, two hundred ninety-two million, four hundred one thousand, three hundred eighty".