1421551248 has 160 divisors (see below), whose sum is σ = 4239895296. Its totient is φ = 406923264.

The previous prime is 1421551247. The next prime is 1421551249. The reversal of 1421551248 is 8421551241.

It is an interprime number because it is at equal distance from previous prime (1421551247) and next prime (1421551249).

It is not an unprimeable number, because it can be changed into a prime (1421551247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 529686 + ... + 532362.

Almost surely, 2^1421551248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421551248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2119947648).

1421551248 is an abundant number, since it is smaller than the sum of its proper divisors (2818344048).

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

1421551248 is a wasteful number, since it uses less digits than its factorization.

1421551248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761 (or 2755 counting only the distinct ones).

The product of its digits is 12800, while the sum is 33.

The square root of 1421551248 is about 37703.4646683829. The cubic root of 1421551248 is about 1124.4000087576.

The spelling of 1421551248 in words is "one billion, four hundred twenty-one million, five hundred fifty-one thousand, two hundred forty-eight".